NDLI: NMR study and electrical properties investigation of Zn$_{2}$P$_{2}$O$

Content Provider	SpringerLink
Author	Jarboui, A. Ben Rhaeim, A. Hlel, F. Gargouri, M.
Copyright Year	2009
Abstract	The α-Zn$_{2}$P$_{2}$O$_{7}$ compound was obtained by conventional solid-state reaction. The sample was characterized by X-ray powder diffraction, solid state $^{31}$P NMR MAS, and electrical impedance spectroscopy. The solid state $^{31}$P MAS NMR, performed at 121.49 MHz, shows three isotropic resonances at −21.1, −18.8, and −15.8 ppm, confirming the non-equivalency of the three PO$_{4}$ groups in the α-Zn$_{2}$P$_{2}$O$_{7}$ form. They are characterized by different chemical shift tensor parameters with the local geometrical features of the tetrahedra. Electrical impedance measurements of β-Zn$_{2}$P$_{2}$O$_{7}$, form stable for temperature greater than 403 K, were performed as a function of both temperature and frequency. The electrical conduction and dielectric relaxation have been studied. The AC conductivity obeys the universal power law. The approximation type correlated barrier hopping model explains the universal behavior of the n exponent. The impedance plane plot shows semicircle arcs at different temperatures, and an electrical equivalent circuit has been proposed to explain the impedance results. The circuits consist of the parallel combination of bulk resistance R $_{p}$ and constant phase elements CPE. The simulated spectra show a good correlation with the experimental data.
Starting Page	67
Ending Page	73
Page Count	7
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	16
Issue Number	1
e-ISSN	18620760
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-02-27
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	AC conductivities Ionic conductivities NMR Condensed Matter Physics Optical and Electronic Materials Renewable and Green Energy Electrochemistry
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Chemical Engineering Materials Science

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